contact arm

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Definitions from WordNet

Noun contact arm has 1 sense

wiper, wiper arm, contact arm - contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet
--₁ is a kind of contact, tangency
--₁ is a part of rheostat, variable resistor; selector, selector switch

Definitions from the Web

Contact Arm

A contact arm refers to a mechanical component that comes into contact with other parts or surfaces to transmit or regulate a signal or a physical force.

Senses and Usages:

Noun:

1. A part of an electrical switch or relay that makes physical contact with another component to complete or interrupt an electrical circuit.

Example sentence: The contact arm in the circuit breaker ensures that electricity flow is cut off when necessary.

2. A movable arm or lever in a machine or apparatus that is designed to establish contact with other objects or parts.

Example sentence: The contact arm in the printing press connects with the paper to transfer the inked image onto it.

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